Age-related changes on the mechanism to control visual attention

众所周知，搜索显示上的干扰物对观察者搜索目标有干扰作用。这表明搜索显示的配置与IT设备的用户友好性和可访问性有关。这是非常重要的适当的界面设计，以澄清认知功能的年龄相关的变化。因此，我们研究了视觉注意的增龄性变化，特别是抑制功能。研究方法有两种：视觉搜索任务和问卷调查法。在视觉搜索任务中，使用了与检测目标无关的起始干扰刺激。结果表明，老年人的检测任务（d '）的敏感性下降时，一个无关的刺激。这表明，老年人的注意力集中变得困难的起始分心，因为注意捕获外源性。此外，还采用记忆容量和注意功能问卷调查了老年人认知功能的主观评价与客观评价之间的关系。在这项研究中，两种不同任务的结果的一个可能的解释是与年龄相关的中央执行功能的恶化。

It is well known that the distracters on search display have an interference effect when the observer searched a target. This indicates that the configuration of search display has relation with the userfriendliness and the accessibility of IT devices. It is very important for appropriate design of interfaces to clarify agerelated changes in cognitive functions. Therefore, we investigated the agerelated changes on visual attention, especially inhibition function. Two approaches were adopted : a visual search task and a questionnaire method. In the visual search task, an onset distracter stimulus which was irrelevant for detecting a target was used. The result showed that a sensitivity of detection task (d') for elderly people decreased when an irrelevant stimulus was presented. This indicated that the focusing of attention became difficult for the elderly people by the onset distracter because of capture of attention exogenously. Furthermore, the relationship between the subjective and the objective evaluation of cognitive function in elderly people were examined by using the questionnaire involving memory capacity and attention function. A possible explanation for the results of both different tasks in this study is the agerelated deterioration of central executive function.